Voltage Control of DC Microgrids: Robustness for Unknown ZIP-Loads

In this letter we propose a new passivity-based control technique for Buck converter based DC microgrids comprising ZIP-loads, i.e., loads with the parallel combination of constant impedance (Z), current (I) and power (P). More precisely, we propose a novel passifying input and a storage function ba...

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Bibliographic Details
Published inIEEE control systems letters Vol. 7; pp. 139 - 144
Main Authors Cucuzzella, Michele, Kosaraju, Krishna Chaitanya, Scherpen, Jacquelien M. A.
Format Journal Article
LanguageEnglish
Published IEEE 2023
Subjects
Capacitors
Decentralized control
Impedance
Inductors
Microgrids
power systems
RLC circuits
Symmetric matrices
uncertain systems
Voltage control
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Summary:In this letter we propose a new passivity-based control technique for Buck converter based DC microgrids comprising ZIP-loads, i.e., loads with the parallel combination of constant impedance (Z), current (I) and power (P). More precisely, we propose a novel passifying input and a storage function based on the mixed potential function introduced by Brayton and Moser, relaxing restrictive (sufficient) conditions on Z, P and the voltage reference, which are usually assumed to be satisfied in the literature. Consequently, we develop a new passivity-based controller that is robust with respect to uncertain ZIP-loads.
ISSN:2475-1456
2475-1456
DOI:10.1109/LCSYS.2022.3187925